﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.Loader;
using System.Text;
using System.Threading.Tasks;

namespace Simple.Core.Helper
{
    /// <summary>
    /// 运行时帮助类
    /// </summary>
    public class RuntimeHelper
    {
        /// <summary>
        /// 获取项目程序集，排除所有的系统程序集(Microsoft.***、System.***等)、Nuget下载包
        /// </summary>
        /// <returns></returns>
        public static IList<Assembly> GetAllAssemblies()
        {
            var list = Assembly.GetEntryAssembly().GetReferencedAssemblies().Select(Assembly.Load)
                .Where(p=>!p.FullName.Contains("Microsoft.")
                && !p.FullName.Contains("System.")).ToList();
            return list;
        }
        /// <summary>
        /// 获取指定名称程序集
        /// </summary>
        /// <param name="assemblyName"></param>
        /// <returns></returns>
        public static Assembly GetAssembly(string assemblyName)
        {
            return GetAllAssemblies().FirstOrDefault(assembly => assembly.FullName.Contains(assemblyName));
        }
        /// <summary>
        /// 获取所有类型
        /// </summary>
        /// <returns></returns>
        public static IList<Type> GetAllTypes()
        {
            var list = new List<Type>();
            foreach (var assembly in GetAllAssemblies())
            {
                var typeInfos = assembly.DefinedTypes;
                foreach (var typeInfo in typeInfos)
                {
                    list.Add(typeInfo.AsType());
                }
            }
            return list;
        }

        public static IList<Type> GetTypesByAssembly(string assemblyName)
        {
            var list = new List<Type>();
            var assembly = AssemblyLoadContext.Default.LoadFromAssemblyName(new AssemblyName(assemblyName));
            var typeInfos = assembly.DefinedTypes;
            foreach (var typeInfo in typeInfos)
            {
                list.Add(typeInfo.AsType());
            }
            return list;
        }

        public static Type GetImplementType(string typeName, Type baseInterfaceType)
        {
            return GetAllTypes().FirstOrDefault(t =>
            {
                if (t.Name == typeName &&
                    t.GetTypeInfo().GetInterfaces().Any(b => b.Name == baseInterfaceType.Name))
                {
                    var typeInfo = t.GetTypeInfo();
                    return typeInfo.IsClass && !typeInfo.IsAbstract && !typeInfo.IsGenericType;
                }
                return false;
            });
        }
    }
}
